Introduction: Car Battery Mig Welder
My Mig welder quit working and I believe it was due to a transformer. So I turned it into a portable mig welder that is ran by car batteries.
This welder is perfect for Trail Rigs and for Off-Road.
Step 1: Out With the Old
Here is the inside of my old welder. I am only going to use a few parts from this as the new welder is very simple.
The only parts I need from the old welder are the DC motor Feed assembly, Spool holder to hold the wire spool, Ground cable, and the Mig gun.
Additional parts that I needed were:
- 24v DC PWM Motor Controller: You can find these on Ebay for about $20-$25
- Jumper cables
- Two 12v car batteries
- Toolbox: Got mine for $6 at Menards
- 24v switch so you don't have to detach jumper cables all the time
Step 2: Put It All Together
I used the tray in the toolbox to support all of the parts. The bottom section was used to store all of the cables and wiring.
I have some pictures of the top of tray, which turned out nice and clean. The underside doesn't look that pretty so I decided just to make a wiring diagram so everyone can better understand how I wired it instead of trying to follow wires in my pictures.
Step 3: Results
As you can see, it weld pretty good for being a toolbox welder. For a clean look I just disconnect the Welder leads and store them under the tray when I am done instead of having everything run out of holes in the side of the toolbox.
I will definitely be taking this out with me next time I'm out on the trails.
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